December weather forecast
Grand Chain, IL

Share

Weather in December

December, the first month of the winter in Grand Chain, is also a frosty month, with an average temperature ranging between min 32.7°F (0.4°C) and max 44.8°F (7.1°C).

Temperature

The start of December signals a decrease in the average high-temperature, transitioning from a fresh 54.5°F (12.5°C) in November to a chilly 44.8°F (7.1°C). Grand Chain encounters a steady low-temperature average of 32.7°F (0.4°C) throughout the month of December.

Humidity

The average relative humidity in December is 78%.

Rainfall

In December, the rain falls for 7.3 days. Throughout December, 0.79" (20mm) of precipitation is accumulated. Throughout the year, there are 118.3 rainfall days, and 13.03" (331mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Grand Chain are January through March, November and December. In Grand Chain, in December, during 1.9 snowfall days, 0.12" (3mm) of snow is typically accumulated. In Grand Chain, during the entire year, snow falls for 11 days and aggregates up to 1.57" (40mm) of snow.

Daylight

With an average of 9h and 36min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 6:51 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 4:48 pm CST.

Sunshine

In December, the average sunshine is 4.8h.

UV index

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 2 transforms into these recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.

Frequently asked questions

What is the temperature in December?

In Grand Chain, in December, the average high-temperature is 44.8°F (7.1°C), and the average low-temperature is 32.7°F (0.4°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines relative humidity and air temperature, in September is appraised at 86°F (30°C).

What is the average humidity in December in Grand Chain?

In December, the average relative humidity is 78%.

How much does it rain in December?

In December, the rain falls for 7.3 days. Throughout December, 0.79" (20mm) of precipitation is accumulated.

How much does it snow in December?

In Grand Chain, Illinois, in December, during 1.9 snowfall days, 0.12" (3mm) of snow is typically accumulated.

What is the month with the shortest days?

December has the shortest days of the year, with an average of 9h and 36min of daylight.

What is the average length of the day in December?

In December, the average day length is 9h and 39min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 6:51 am and sunset at 4:38 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 4:48 pm CST.

How many hours of sunshine does Grand Chain have in December?

The average sunshine duration in December is 4.8h.

When is the lowest UV index?

January, February and December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in December?

The average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Grand Chain, IL

Average temperature in December - Grand Chain, IL
  • Average high temperature in December: 44.8°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in December: 32.7°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (27°F).

Average pressure in December
Grand Chain, IL

Average pressure in December - Grand Chain, IL
  • Average pressure in December: 30.14"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in December
Grand Chain, IL

Average wind speed in December - Grand Chain, IL
  • Average wind speed in December: 8.5mph

The windiest months (with the highest average wind speed) are January and February (9mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

Average humidity in December
Grand Chain, IL

Average humidity in December - Grand Chain, IL
  • Average humidity in December: 78%

The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Grand Chain, IL

Average rainfall in December - Grand Chain, IL
  • Average rainfall in December: 0.79"

The wettest month (with the highest rainfall) is June (1.5").
The driest month (with the least rainfall) is September (0.47").

Average rainfall days in December
Grand Chain, IL

Average rainfall days in December - Grand Chain, IL
  • Average rainfall days in December: 7.3 days

The month with the highest number of rainy days is July (13.1 days).
The months with the least rainy days are January, February and December (7.3 days).

Average snowfall in December
Grand Chain, IL

Average snowfall in December - Grand Chain, IL
  • Average snowfall in December: 0.12"

The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in December
Grand Chain, IL

Average snowfall days in December - Grand Chain, IL
  • Average snowfall days in December: 1.9 days

The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in December /
Average sunshine in December
Grand Chain, IL

Average daylight in December / Average sunshine in December - Grand Chain, IL
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 4h and 5min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).

Average sunshine days in December
Grand Chain, IL

Average sunshine days in December - Grand Chain, IL
  • Average sunshine days in December: 21.2 days

The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is June (14.8 days).

Average UV index in December
Grand Chain, IL

Average UV index in December - Grand Chain, IL
  • Average UV index in December: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in December
Grand Chain, IL

Average cloud cover in December - Grand Chain, IL
  • Average cloud cover in December: 49

The months with the most cloud cover are January and February (Cloud cover 51).
The month with the least cloud cover is September (Cloud cover 28).

Average visibility in December
Grand Chain, IL

Average visibility in December - Grand Chain, IL
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

Grand Chain, Illinois, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location